3 ms·TOTP requires an app, Yubico Authenticator.by nickik 10y agoTOTP requires an app, Yubico Authenticator.daveguy 10y agoExactly, and if you are going to use an app anyway, you may as well have the app keep the token.nickik 10y agoI actually still use it because this was I can use somebody else phone or some other device if I need to. That has come in very handy before.